Attaching cutters for cutting screws out rails of bedsteads



` the cylindrical` head with its V shaped cutter removed. Fig. 2, is anend view of the one end of the opening A in the cylinderB,

* spective view of the V shaped cutter;

lowing; that is to say, forming an opening la manner, as to allow the Vshaped cutter C frnn'r non.

JACOB ZIMMER, OF TIFFIN, OHIO.

ATTACHING CUTTERS FOR UT'IING SCREW S ON RAILS 0F BEDSTEADS.

Specification of Letters Patent No. 8,620, dated December 28, 1851.

To all whom t may concern:

Be it known that I, JACOB ZIMMER, ofthe city of Tiflin, in the county ofSeneca yand State of Ohio, have invented a new and useful Improvement inthe Manner of Securing V-Shaped Cutters in Rotary Cylindrical Heads forCutting Screws on Tenons of Bedstead-Rails; and I do hereby declare thefollowing to be a full and clear description thereof, reference beinghad to the anneXed drawings of the same, making part 0f thisspecification.

Figure l represents a perspective view of cylinder head and cutter. Fig.3, is a per- The same letters of reference indicate the same parts ontheligures.

I `am aware that V shaped cutters have been secured in rotarycylindrical heads. for cut-ting screws on tenons of bedstead rails, invarious ways, such as letting the tapered end of the shank of thecutter, into `a recess on the exterior portion of the cylindrical headand bringing the angular shoulder of the underside of the shank againstthe smaller end of the opening through which the Y. front part of thecutter projects, and sustaining the beveled points of the latter againstthe interior beveled surface of the cylindrical head. But I am not awarethat V shaped cutters have been confined in rotating cylindrical headsin the manner fol- A in the end of the cylinder head B in such to beplaced laterally therein, or inserted sidewise into its seat, andconfinedby means of an angular shoulder D formed on the upper side ofthe shankE and embracing and by angular notches F, F, at the front otthe cutter, embracing that portion of the cylinder, correspondingtherewith in form,

and rendered perfectly lirm, requiring no adjustment whatever, the formof the cutter exactly fitting the side, and ends of the opening in thecylinder head. The head of the conning screw bolt G is countersunk inthe cylinder, and the shank thereof passes through theshank E of thecutter. The

front ends of the cutter in which are the angular notches F areincreased in thickness as seen in Fig. 3, for resisting the thrust 0f`the cutter centerward or otherwise.l during the operation of cuttingscrews. Having thus described my improvement 1n securing V shapedcutters in rotary cylinder heads for cutting screws on tenons ofbedstead rails, I wish it to be understood that all I claim as myinvention and desire to secure by Letters Patent, ish

Forming an opening A in the end of the cylindrical head B so as to allowthe cutter C, to be placed ther-ein laterally, or inserted into its seatsidewise, and securely confined in the Amanner herein-before set forthwhereby the cutter C requires no' adjustment, and is retained firmly inits position.

In testimony whereof I have hereunto signed my name before twosubscribing witnesses.

JACOB ZIMMER.

Witnesses:

Jas.y P. PoLLARs, CHARLES,` CRONISE.

